412 
PACIFIC SCIENCE, VoL VII, October, 1953 
lobe near base of inner. First abdominal ap- 
pendage shown in Figure 9/ The coloration 
of the specimen is sufficient to distinguish it 
from others which I have examined. The 
ground color is an opaque white, which is 
partially obscured by dark-brown chromato- 
phores along the posterior border of the thor- 
acic and abdominal somites and which also 
clearly mark all the longitudinal carinae of 
the body. The cornea of the eyes is a deep 
black, the eyestalks retaining the opaque 
white of the body. Specimen 26 mm, long. 
TYPE locality: a single male specimen 
26 mm. long was collected by the Territorial 
Division of Fish and Game at a night light 
station at Hilo Dock, Hilo, Hawaii. 
DISCUSSION: Although the penis which is 
located at the base of the eighth thoracic 
appendage is present, the specimen is ap- 
parently immature, as the accessory repro- 
ductive organ on the endopod of the first 
abdominal appendage is undeveloped. In 
spite of this condition I feel that the other 
characteristics are sufficiently distinct for the 
separation of this specimen from the other 
species in this genus. 
At first glance this species and Squilla alba 
appear to be very similar; but the immovable 
submedian spines along the outer margin of 
the telson, the more numerous spines along 
the outer margin of the uropods, the shape 
of the lateral margin of the fifth thoracic som- 
ite, and the single lobe at the base of the 
inner spine of the uropod will serve to dis- 
tinguish this species from 5. alba. The round- 
ed anterolateral angles of the carapace, the 
large globular eyes, and the six teeth on the 
raptorial dactylus are shared by both these 
species and will serve to separate them from 
the other members of this genus. 
The fifth thoracic somite in this specimen 
appears to be composed of two distinct proc- 
esses when seen from above, but it is different 
from others showing this same condition. In 
others, e.g., S. laevisHtss (1865), 5. hieroglyph- 
ica Kemp (1911), and 5. alba Bigelow (1893), 
there is a spine directed anteriorly and a 
rounded posterior lobe. Here both processes 
are distinctly angulaq the anterior spine 
curved forward, the posterior one projecting 
laterally. The shape of the sixth thoracic som- 
ite is distinctive in this species as well, in 
that the others have rounded lateral margins 
or are distinctly bilobed. 
TYPE SPECIMEN: U.S.N.M. 93097. 
Pseudosquilla ciliata (Fabricius) 
Figs. 10, Wa-rn 
Squilla ciliata Fabricius, 1787: 333. 
Cancer ciliatus\Am\ 2 ,^\i^, 1790: 2990. 
Cancer {mantis) [sic] c/7/^toj- Herbst, 1796: 102. 
Squilla stylifera 1818: 189. 
Squilla quadrispinosa Eydoux and Souleyet, 
1841: 262, pi. 5, fig. 1. 
Pseudosquilla stylifera Dana, 1852: 622, pi. 12, 
figs. 4a-e. 
DESCRIPTION: Carapace longer than great- 
est breadth, slightly narrower anteriorly than 
posteriorly with conspicuous gastric grooves, 
cervical groove wholly absent, lacking cari- 
nae, anterolateral and posterolateral angles 
unarmed and rounded. Rostrum rounded an- 
teriorly, about as wide as long, covering the 
ophthalmic somite. Eyes tubular, cornea fol- 
lowing long axis of stalk (Fig. 11^). Merus 
of raptorial claw articulating terminally with 
ischium, ventral surface grooved throughout 
its length for reception of propodus; propo- 
dus with fine pectinations along outer margin 
and with four movable spines near proximal 
end; dactylus with three (sometimes four) 
long, sharp teeth. Propodus of fifth thoracic 
appendage subcircular, slightly longer than^ 
wide (Fig. Hi). Mandibular palp of three 
segments. Free thoracic and abdominal som- 
ites compressed, all lacking longitudinal cari- 
nae; sixth, seventh, and eighth thoracic som- 
ites exposed; posterolateral angles of abdom- 
inal somites with small, sharp spines; sixth 
abdominal somite with four spines, two sub- 
median, two intermediate. Telson with seven 
carinae, one median, two submedian, two 
